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#install.packages("corrplot")
#install.packages("Rfast")
#install.packages("phyloseq")
#install.packages("glmnet")
#install.packages("randcorr")
#install.packages("hrbrthemes")
library(randcorr)
library(ggplot2)
library(hrbrthemes)
library(Rfast)
library(corrplot)
# 1a
create_TC = function(interval, one_time, start_time){
# Create initial matrix
TC = matrix(0, 240, 1)
# Counts for how many ones have been added / not added
on_count = 1
off_count = 0
for(i in 1:240){
# Check if the current time in source is before our start time
if (i <= start_time) {
next
}
# Change value in matrix if it is within the time period to do so
# Otherwise increment the time that one has not been added
# Reset if at the end of a interval
if(on_count <= one_time) {
TC[i] = 1
on_count = on_count + 1
} else{
off_count = off_count + 1
if (off_count == interval - one_time) {
on_count = 1
off_count = 0
}
}
}
return(TC)
}
# 1a
TC1 = create_TC(30, 15, 0)
TC2 = create_TC(45, 20, 20)
TC3 = create_TC(60, 25, 0)
TC4 = create_TC(40, 15, 0)
TC5 = create_TC(40, 20, 0)
TC6 = create_TC(40, 25, 0)
# 1a
standard_TC1 = scale(TC1)
standard_TC2 = scale(TC2)
standard_TC3 = scale(TC3)
standard_TC4 = scale(TC4)
standard_TC5 = scale(TC5)
standard_TC6 = scale(TC6)
full_TC = matrix(c(standard_TC1, standard_TC2, standard_TC3, standard_TC4, standard_TC5, standard_TC6), 240, 6)
#normalised_TC1 = sqrt(sum(TC1^2))
#normalised_TC2 = sqrt(sum(TC2^2))
#normalised_TC3 = sqrt(sum(TC3^2))
#normalised_TC4 = sqrt(sum(TC4^2))
#normalised_TC5 = sqrt(sum(TC5^2))
#normalised_TC6 = sqrt(sum(TC6^2))
#(TC1 / normalised_TC1)[1:50]
#(TC5 / normalised_TC5)[1:50]
#(TC6 / normalised_TC6)[1:50]
# 1a
par(mfrow=c(2,3))
plot(full_TC[1:nrow(full_TC), 1], ylab = "Temporal source 1", pch = 1, type = "line")
plot(full_TC[1:nrow(full_TC), 2], ylab = "Temporal source 2", pch = 1, type = "line")
plot(full_TC[1:nrow(full_TC), 3], ylab = "Temporal source 3", pch = 1, type = "line")
plot(full_TC[1:nrow(full_TC), 4], ylab = "Temporal source 4", pch = 1, type = "line")
plot(full_TC[1:nrow(full_TC), 5], ylab = "Temporal source 5", pch = 1, type = "line")
plot(full_TC[1:nrow(full_TC), 6], ylab = "Temporal source 6", pch = 1, type = "line")

# If we normalise, the values of TC will be same where as standardised values
# Are not the same inter TC eg
# All TC will have 0 values still
# 1b
correlation = cor(full_TC)
corrplot.mixed(correlation, tl.srt = 0)

correlation
[,1] [,2] [,3] [,4] [,5] [,6]
[1,] 1.000000e+00 3.175488e-21 1.690309e-01 0.08606630 -4.536411e-22 0.0860663
[2,] 3.175488e-21 1.000000e+00 -2.857143e-02 0.13093073 1.769200e-20 -0.1309307
[3,] 1.690309e-01 -2.857143e-02 1.000000e+00 0.04364358 4.082770e-21 0.1309307
[4,] 8.606630e-02 1.309307e-01 4.364358e-02 1.00000000 7.745967e-01 0.6000000
[5,] -4.536411e-22 1.769200e-20 4.082770e-21 0.77459667 1.000000e+00 0.7745967
[6,] 8.606630e-02 -1.309307e-01 1.309307e-01 0.60000000 7.745967e-01 1.0000000
# Comment on if on TC correlation or not
# 4/5, 5/6 highly correlated as size of circle is size of correlation and relatively positvely correlated
# 1c
create_tmpSM = function(vert_start,vert_end, horo_start, horo_end) {
tmpSM = matrix(0, 21, 21)
tmpSM[vert_start:vert_end, horo_start:horo_end] = 1
return(tmpSM)
}
# 1c
tmpSM1 = create_tmpSM(2, 6, 2, 6)
tmpSM2 = create_tmpSM(2, 6, 15, 19)
tmpSM3 = create_tmpSM(8, 13, 2, 6)
tmpSM4 = create_tmpSM(8, 13, 15, 19)
tmpSM5 = create_tmpSM(15, 19, 2, 6)
tmpSM6 = create_tmpSM(15, 19, 15, 19)
create_df = function(vert_start,vert_end, horo_start, horo_end) {
df1 = expand.grid(seq_len(21), seq_len(21))
tmp = matrix(0,21,21)
tmp[vert_start:vert_end, horo_start:horo_end] = 1
column = as.vector(tmp)
df1$data = (column)
return(df1)
}
plot1 = create_df(2, 6, 2, 6)
plot2 = create_df(2, 6, 15, 19)
plot3 = create_df(8, 13, 2, 6)
plot4 = create_df(8, 13, 15, 19)
plot5 = create_df(15, 19, 2, 6)
plot6 = create_df(15, 19, 15, 19)
ggplot(plot1, aes(Var1, Var2, fill= data)) +
geom_tile() + scale_fill_gradient(low="blue", high="red") +
theme_ipsum()

ggplot(plot2, aes(Var1, Var2, fill= data)) +
geom_tile() + scale_fill_gradient(low="blue", high="red") +
theme_ipsum()

ggplot(plot3, aes(Var1, Var2, fill= data)) +
geom_tile() + scale_fill_gradient(low="blue", high="red") +
theme_ipsum()

ggplot(plot4, aes(Var1, Var2, fill= data)) +
geom_tile() + scale_fill_gradient(low="blue", high="red") +
theme_ipsum()

ggplot(plot5, aes(Var1, Var2, fill= data)) +
geom_tile() + scale_fill_gradient(low="blue", high="red") +
theme_ipsum()

ggplot(plot6, aes(Var1, Var2, fill= data)) +
geom_tile() + scale_fill_gradient(low="blue", high="red") +
theme_ipsum()

# 1c
tmpSM1 = matrix(tmpSM1, 1, 441)
tmpSM2 = matrix(tmpSM2, 1, 441)
tmpSM3 = matrix(tmpSM3, 1, 441)
tmpSM4 = matrix(tmpSM4, 1, 441)
tmpSM5 = matrix(tmpSM5, 1, 441)
tmpSM6 = matrix(tmpSM6, 1, 441)
tmpSM = matrix(c(tmpSM1, tmpSM2, tmpSM3, tmpSM4, tmpSM5, tmpSM6), 441, 6)
tmpSM = t(tmpSM)
correlation2 = cor(t(tmpSM))
corrplot.mixed(correlation2, upper = "circle")

correlation2
[,1] [,2] [,3] [,4] [,5] [,6]
[1,] 1.00000000 -0.06009615 -0.06623127 -0.06623127 -0.06009615 -0.06009615
[2,] -0.06009615 1.00000000 -0.06623127 -0.06623127 -0.06009615 -0.06009615
[3,] -0.06623127 -0.06623127 1.00000000 -0.07299270 -0.06623127 -0.06623127
[4,] -0.06623127 -0.06623127 -0.07299270 1.00000000 -0.06623127 -0.06623127
[5,] -0.06009615 -0.06009615 -0.06623127 -0.06623127 1.00000000 -0.06009615
[6,] -0.06009615 -0.06009615 -0.06623127 -0.06623127 -0.06009615 1.00000000
# Are theres SM all independent? - yes as not correlated
# Why standardisation not important - If we are looking to replicate it then
# We still just have two main areas - zero and non zero so the scale of non 0
# Doesn't matter as much
#1d
set.seed(30034)
noise_t = rnorm(6 * 240, mean = 0, sd = sqrt(0.25))
noise_s = rnorm(6 * 441, mean = 0, sd = sqrt(0.15))
noise_s = matrix(noise_s, 6, 441)
noise_t = matrix(noise_t, 240, 6)
# 1d
correlation3 = cor(noise_t)
corrplot(correlation3, tl.srt = 0)

correlation4 = cor(t(noise_s))
corrplot(correlation4, tl.srt = 0)

# Check if these two above are correlated
# Highest is like abs(0.12,0.15) so not really that strongly correlated
# 1d
# Both look pretty normally distributed with over 95% of the data covered within -1.96, 1.96
hist(noise_s)

hist(noise_t)

# Both are equal to 1 even with formula variance = 1.96sd, noise_s = 0.945 so pre close, noise_t slight less 0.936 makes sense with graph
#length(noise_s[(0 - 2*sqrt(0.15) <= noise_s) & (noise_s <= 0 + 2*sqrt(0.15))]) / length(noise_s)
#length(noise_t[(0 - 2*sqrt(0.25) <= noise_t) & (noise_t <= 0 + 2*sqrt(0.25))]) / length(noise_t)
# noise s looks way more normally distributed, while t looks kinda skewed.
# do conf int to normal dist
# Check whether fills var of 1.96*sd (0.95 data)
correlation5 = cor(noise_t %*% noise_s)
#corrplot(correlation5, tl.srt = 0)
subset = correlation5[1:10, 1:10]
corrplot(subset, tl.srt = 0)

subset
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
[1,] 1.00000000 -0.08401539 0.08121198 -0.48582752 -0.2122397 -0.58300192 0.7469938 0.1747322 -0.4616947 0.69749810
[2,] -0.08401539 1.00000000 -0.36170166 -0.08651628 0.3311008 -0.65485963 0.1186072 -0.6562960 0.2556765 -0.27880412
[3,] 0.08121198 -0.36170166 1.00000000 -0.61666983 -0.2739593 0.05563854 0.4470863 0.6308545 -0.6288561 -0.05763502
[4,] -0.48582752 -0.08651628 -0.61666983 1.00000000 0.2248447 0.47069260 -0.5268018 -0.4475564 0.4159525 -0.37703467
[5,] -0.21223971 0.33110081 -0.27395932 0.22484470 1.0000000 0.24773797 -0.1582580 -0.5139208 0.6008665 -0.70374353
[6,] -0.58300192 -0.65485963 0.05563854 0.47069260 0.2477380 1.00000000 -0.6314982 0.2674007 0.3960874 -0.40361348
[7,] 0.74699385 0.11860722 0.44708627 -0.52680181 -0.1582580 -0.63149817 1.0000000 0.2406842 -0.5654764 0.25340041
[8,] 0.17473222 -0.65629601 0.63085453 -0.44755642 -0.5139208 0.26740068 0.2406842 1.0000000 -0.2328050 0.37238708
[9,] -0.46169469 0.25567646 -0.62885608 0.41595249 0.6008665 0.39608744 -0.5654764 -0.2328050 1.0000000 -0.39341424
[10,] 0.69749810 -0.27880412 -0.05763502 -0.37703467 -0.7037435 -0.40361348 0.2534004 0.3723871 -0.3934142 1.00000000
#corrplot(correlation5, tl.srt = 0)[1:10, 1:10]
# Definitely some correlation eg higher covariance values such as 0.7
#1e
#Can full_tc%*% noise_S and vice versa exist and what happens to them as if we keep we cannot fit model?
X = (full_TC + noise_t) %*% (tmpSM + noise_s)
scaled_X = matrix(NA, 240, 441)
for (i in 1:441) {
scaled_X[,i] = scale(X[,i])
}
# Plot graph of sample Time series
set.seed(1)
mysample <- sample(nrow(X), 100)
mysample
[1] 68 167 129 162 215 43 14 210 187 51 225 85 21 106 182 74 7 73 79 213 37 105 217 110 165 34 227 126 89 172 207
[32] 33 84 163 70 230 42 166 111 148 156 20 44 121 87 206 197 40 211 25 119 122 39 179 204 134 24 160 234 130 45 146
[63] 22 115 104 195 175 176 103 75 13 193 212 23 218 208 192 29 141 150 200 108 48 209 180 149 31 102 145 223 196 83 118
[94] 90 158 107 64 164 60 231
sample = X[1:nrow(X), mysample]
#for (j in 1:10) {
# if (j == 1) {
# plot(sample[1:nrow(X), (i - 1)*10 + j], type = "line")
# }
# else {
# if (j == 2) {
# lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'red')
# }
#
# if (j == 3) {
# lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'blue')
# }
#
# if (j == 4) {
# lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'green')
# }
#
# if (j == 5) {
# lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'yellow')
# }
# if (j == 6) {
# lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'darkorange')
# }
#
# if (j == 7) {
# lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'cyan')
# }
# if (j == 8) {
# lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'brown')
# }
# if (j == 9) {
# lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'grey')
# }
#
# if (j == 10) {
# lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'beige')
# }
#
# }
#
#}
# What info does the plot of vars give
variances = colVars(X)
plot(variances, type = "line")

NA
NA
NA
# 2a
A_LSR = solve(t(full_TC) %*% full_TC) %*% t(full_TC) %*% scaled_X
D_LSR = scaled_X%*% abs(t(A_LSR))
# Plot and heatmap together
plot(D_LSR[1:nrow(D_LSR),1], type = "line")

# produce legend for heatmap
#heatmap(matrix(A[1,1:ncol(A_LSR)], 21, 21), ncol, Colv = NA, Rowv = NA, scale="column")
for (num in 1:6) {
df = as.data.frame(matrix(rep(0, 441 * 3), 441, 3))
count = 1
col = abs(A_LSR[num,])
for (i in 1:21) {
for (j in 1:21) {
df[count, 1] = i
df[count, 2] = j
df[count, 3] = col[(i-1) * 21 + j]
count = count + 1
}
}
ggplot(df, aes(V1, V2, fill= V3)) +
geom_tile() + scale_fill_gradient(low="blue", high="red") +
theme_ipsum()
}
# WHy linear relo bet 3rd col d_lsr and 30th of X
# Secondly if you look at the slice number 3 build up by third SM. Now read this 3rd SM column-wise, you will find that 30th (2nd column 9th row =30th pixel) pixel position was filled by this 3rd SM and therefore third TC is the only time course that constructs 30th column of X and this is the TC that you retrieve in 3rd Dlsr. There might be some variance in the scatter plot but you will be able to capture visually the linear trend between 3rd Dlsr and 30th X.
#linear relo -
plot(D_LSR[1:nrow(D_LSR), 3], scaled_X[1:nrow(scaled_X), 30], xlab = "3rd column of D(LSR)", ylab = "30th column of scaled X")

# No linear relo
plot(D_LSR[1:nrow(D_LSR), 4], scaled_X[1:nrow(scaled_X), 30], xlab = "3rd column of D(LSR)", ylab = "30th column of scaled X")

# Gets the sum of the maximum absolute values in the correlation matrix
max_abs_corr_sum = function(mat1, mat2) {
corre_mat = cor(mat1, mat2)
c = get_max_correlations(corre_mat)
return(sum(c))
}
# Returns the values of the maximum absolute values for each row
get_max_correlations = function(cor_mat) {
c_var = c(rep(0,6))
abs_mat = abs(cor_mat)
cols = max.col(abs_mat)
for (i in 1:6) {
c_var[i] = cor_mat[i, cols[i]]
}
return(c_var)
}
#2b
V = 441
MSE = matrix(0, 1, 2)
for (num in seq(from = 0, to = 1, by = 0.01)) {
lamda = num
lamda_hat = lamda * V
A_RR = solve(t(full_TC) %*% full_TC + diag(nrow(t(full_TC))) * lamda_hat) %*% t(full_TC) %*% scaled_X
mse = (sum((scaled_X - full_TC %*% abs(A_RR))^2)) + lamda_hat * sum(A_RR^2)
MSE = rbind(MSE, c(lamda, mse))
}
plot(MSE[2:nrow(MSE), 1], MSE[2:nrow(MSE), 2])

# From the graph it looks like best value of lamda is 1
A_RR = solve(t(full_TC) %*% full_TC + diag(nrow(t(full_TC))) * 1* V) %*% t(full_TC) %*% scaled_X
D_RR = scaled_X%*% abs(t(A_RR))
c_tlsr = max_abs_corr_sum(full_TC, D_LSR)
c_trr = max_abs_corr_sum(full_TC, D_RR)
# 4.407241
c_tlsr
[1] 4.506323
# 4.47653
c_trr
[1] 4.682376
c_trr - c_tlsr
[1] 0.1760527
lamda = 1000
lamda_hat = lamda * V
A_1000 = solve(t(full_TC) %*% full_TC + diag(nrow(t(full_TC))) * lamda_hat) %*% t(full_TC) %*% scaled_X
# As A_LSR decrease, A_RR values decrease
plot(abs(A_1000[1:nrow(A_1000), 1]), abs(A_LSR[1:nrow(A_LSR), 1]), xlab = "A_RR", ylab = "A_LSR")

create_noise_matrix = function(seed) {
set.seed(seed = seed)
noise_t = rnorm(6 * 240, mean = 0, sd = sqrt(0.25))
noise_s = rnorm(6 * 441, mean = 0, sd = sqrt(0.15))
noise_s = matrix(noise_s, 6, 441)
noise_t = matrix(noise_t, 240, 6)
X = (full_TC + noise_t) %*% (tmpSM + noise_s)
new_X = scale(X)
return(new_X)
}
noise_1 = create_noise_matrix(30035)
noise_2 = create_noise_matrix(30037)
noise_3 = create_noise_matrix(30038)
noise_4 = create_noise_matrix(30036)
noise_5 = create_noise_matrix(30039)
noise_6 = create_noise_matrix(30040)
noise_7 = create_noise_matrix(30041)
noise_8 = create_noise_matrix(30042)
noise_9 = create_noise_matrix(30043)
noise_10 = create_noise_matrix(30044)
noise_df = list(noise_1, noise_9, noise_8, noise_7, noise_6, noise_5,
noise_2, noise_3, noise_4, noise_10
)
#for(mat in noise_df) {
# print(mat[1:5, 1:3]
#}
#2c
LR_MSE = matrix(NA, 21, 10)
N = 240
x1 = 21
x2 = 21
nsrcs = 6
V = x1 * x2
i = 1
j = 1
step <- 1/(norm(full_TC %*% t(full_TC)) * 1.1)
for (num in seq(0,1,0.05)) {
for (x_rep in noise_df) {
thr <- num*N*step
Ao <- matrix(0, nsrcs, 1)
A <- matrix(0, nsrcs, 1)
Alr <- matrix(0, nsrcs, x1*x2)
for (k in 1:(x1*x2)) {
A <- Ao+step*(t(full_TC) %*% (x_rep[,k]-(full_TC%*%Ao)))
A <- (1/(1+thr)) * (sign(A)*pmax(replicate(nsrcs, 0), abs(A)-thr))
for (rep in 1:10) {
Ao <- A
A <- Ao+step * (t(full_TC)%*%(x_rep[,k]-(full_TC%*%Ao)))
A <- (1/(1+thr)) * (sign(A)*pmax(replicate(nsrcs, 0), abs(A)-thr))
}
Alr[,k] <- A
}
Dlr = x_rep %*% abs(t(Alr))
LR_MSE[i,j] = sum(sum((x_rep-Dlr%*%abs(Alr))^2)) / (N*V)
j = j + 1
}
j = 1
i = i + 1
}
LR_avgs = rowMeans(LR_MSE)
plot( seq(0,1, 0.05), LR_avgs, ylab = "MSE(LR)")

# Min value is 0.580 when p = 0.55, at same value it diverges
# Since first index is at 0, we want the 12th value between 0 and 1 which is 0.6
# So we need to index the 13th value
index = which.min(LR_avgs)
rho = (index - 1) * 0.05
# 2d
thr <- rho*N*step
Ao <- matrix(0, nsrcs, 1)
A <- matrix(0, nsrcs, 1)
Alr <- matrix(0, nsrcs, x1*x2)
for (k in 1:(x1*x2)) {
A <- Ao+step*(t(full_TC) %*% (scaled_X[,k]-(full_TC%*%Ao)))
A <- (1/(1+thr)) * (sign(A)*pmax(replicate(nsrcs, 0), abs(A)-thr))
for (rep in 1:10) {
Ao <- A
A <- Ao+step * (t(full_TC)%*%(scaled_X[,k]-(full_TC%*%Ao)))
A <- (1/(1+thr)) * (sign(A)*pmax(replicate(nsrcs, 0), abs(A)-thr))
}
Alr[,k] <- A
}
Dlr = scaled_X %*% abs(t(Alr))
ctrr = max_abs_corr_sum(full_TC, D_RR)
csrr = max_abs_corr_sum(t(tmpSM), t(A_RR))
ctlr = max_abs_corr_sum(full_TC, Dlr)
cslr= max_abs_corr_sum(t(tmpSM), t(Alr))
# Both are true
ctlr - ctrr #= 0.7413487
[1] 0.6743216
cslr - csrr #= 0.6595151
[1] 0.6778317
ctlr #= 5.217879
[1] 5.356698
ctrr #= 4.47653
[1] 4.682376
cslr #= 2.953101
[1] 2.937037
csrr #= 2.293586
[1] 2.259206
plot(D_RR[, 1:4])

plot(Dlr[, 1:4])

plot(Alr[1:4,])

plot(A_RR[1:4, ])
par(mfrow = c(1,2))

for (num in 1:6) {
plot(D_RR[, 6], type = "line")
plot(Dlr[, 6], type = "line")
}

plot type 'line' will be truncated to first character

plot type 'line' will be truncated to first character

plot type 'line' will be truncated to first character

plot type 'line' will be truncated to first character

plot type 'line' will be truncated to first character

df = as.data.frame(matrix(rep(0, 441 * 3), 441, 3))
count = 1
vec = abs(A_RR[num,])
for (num in 1:6) {
for (i in 1:21) {
for (j in 1:21) {
df[count, 1] = i
df[count, 2] = j
df[count, 3] = vec[(i-1) * 21 + j]
count = count + 1
}
}
}
df = as.data.frame(matrix(rep(0, 441 * 3), 441, 3))
count = 1
vec = abs(Alr[num,])
for (num in 1:6) {
for (i in 1:21) {
for (j in 1:21) {
df[count, 1] = i
df[count, 2] = j
df[count, 3] = vec[(i-1) * 21 + j]
count = count + 1
}
}
}
ggplot(df, aes(V1, V2, fill= V3)) +
geom_tile() + scale_fill_gradient(low="blue", high="red") +
theme_ipsum()

par(mfrow=c(1,2))
# 2e
#svd(full_TC)
plot(svd(full_TC)$d, ylab = "Eigenvalue")
#PC 6 smallest
plot(svd(full_TC)$u[1:240, 6])

plot(full_TC[1:240, 6])
plot(svd(full_TC)$u[1:240, 5])

plot(full_TC[1:240, 5])
plot(svd(full_TC)$u[1:240, 4])

plot(full_TC[1:240, 4])
plot(svd(full_TC)$u[1:240, 3])

plot(full_TC[1:240, 3])
plot(svd(full_TC)$u[1:240, 2])

plot(full_TC[1:240, 2])
plot(svd(full_TC)$u[1:240, 1])

plot(full_TC[1:240, 1])

NA
NA
---
title: "R Notebook"
output: html_notebook
---

This is an [R Markdown](http://rmarkdown.rstudio.com) Notebook. When you execute code within the notebook, the results appear beneath the code. 

Try executing this chunk by clicking the *Run* button within the chunk or by placing your cursor inside it and pressing *Cmd+Shift+Enter*. 
```{r}
#install.packages("corrplot")
#install.packages("Rfast")
#install.packages("phyloseq")
#install.packages("glmnet")
#install.packages("randcorr")
#install.packages("hrbrthemes")
library(randcorr)
library(ggplot2)
library(hrbrthemes)
library(Rfast)
library(corrplot)
```


```{r}
# 1a
create_TC = function(interval, one_time, start_time){
  
  # Create initial matrix
  TC = matrix(0, 240, 1)
  
  # Counts for how many ones have been added / not added
  on_count = 1
  off_count = 0
  
  for(i in 1:240){
    
    # Check if the current time in source is before our start time
    if (i <= start_time) {
      next
    }
    
    # Change value in matrix if it is within the time period to do so 
    # Otherwise increment the time that one has not been added
    # Reset if at the end of a interval
    if(on_count <= one_time) {
      TC[i] = 1
      on_count = on_count + 1
    } else{
      off_count = off_count + 1
      if (off_count == interval - one_time) {
        on_count = 1
        off_count = 0
      }
  
    }
  
  }
  return(TC)
}
```


```{r}
# 1a
TC1 = create_TC(30, 15, 0)
TC2 = create_TC(45, 20, 20)
TC3 = create_TC(60, 25, 0)
TC4 = create_TC(40, 15, 0)
TC5 = create_TC(40, 20, 0)
TC6 = create_TC(40, 25, 0)

```

```{r}
# 1a
standard_TC1 = scale(TC1)
standard_TC2 = scale(TC2)
standard_TC3 = scale(TC3)
standard_TC4 = scale(TC4)
standard_TC5 = scale(TC5)
standard_TC6 = scale(TC6)
full_TC = matrix(c(standard_TC1, standard_TC2, standard_TC3, standard_TC4, standard_TC5, standard_TC6), 240, 6)

#normalised_TC1 = sqrt(sum(TC1^2))
#normalised_TC2 = sqrt(sum(TC2^2))
#normalised_TC3 = sqrt(sum(TC3^2))
#normalised_TC4 = sqrt(sum(TC4^2))
#normalised_TC5 = sqrt(sum(TC5^2))
#normalised_TC6 = sqrt(sum(TC6^2))

#(TC1 / normalised_TC1)[1:50]
#(TC5 / normalised_TC5)[1:50]
#(TC6 / normalised_TC6)[1:50]
```


```{r}
# 1a
par(mfrow=c(2,3))

plot(full_TC[1:nrow(full_TC), 1], ylab = "Temporal source 1", pch = 1, type = "line")
plot(full_TC[1:nrow(full_TC), 2], ylab = "Temporal source 2", pch = 1, type = "line")
plot(full_TC[1:nrow(full_TC), 3], ylab = "Temporal source 3", pch = 1, type = "line")
plot(full_TC[1:nrow(full_TC), 4], ylab = "Temporal source 4", pch = 1, type = "line")
plot(full_TC[1:nrow(full_TC), 5], ylab = "Temporal source 5", pch = 1, type = "line")
plot(full_TC[1:nrow(full_TC), 6], ylab = "Temporal source 6", pch = 1, type = "line")



# If we normalise, the values of TC will be same where as standardised values 
# Are not the same inter TC eg
# All TC will have 0 values still
```

```{r}
# 1b

correlation = cor(full_TC)
corrplot.mixed(correlation, tl.srt = 0)

correlation
# Comment on if on TC correlation or not
# 4/5, 5/6 highly correlated as size of circle is size of correlation and relatively positvely correlated
```

```{r}
# 1c
create_tmpSM = function(vert_start,vert_end, horo_start, horo_end) {
  tmpSM = matrix(0, 21, 21)
  tmpSM[vert_start:vert_end, horo_start:horo_end] = 1
  return(tmpSM)
}
```


```{r}
# 1c
tmpSM1 = create_tmpSM(2, 6, 2, 6)
tmpSM2 = create_tmpSM(2, 6, 15, 19)
tmpSM3 = create_tmpSM(8, 13, 2, 6)
tmpSM4 = create_tmpSM(8, 13, 15, 19)
tmpSM5 = create_tmpSM(15, 19, 2, 6)
tmpSM6 = create_tmpSM(15, 19, 15, 19)
```

```{r}

create_df = function(vert_start,vert_end, horo_start, horo_end) {
  df1 = expand.grid(seq_len(21), seq_len(21))
  tmp = matrix(0,21,21)
  tmp[vert_start:vert_end, horo_start:horo_end] = 1
  column = as.vector(tmp)
  df1$data = (column)
  return(df1)
}

plot1 = create_df(2, 6, 2, 6)
plot2 = create_df(2, 6, 15, 19)
plot3 = create_df(8, 13, 2, 6)
plot4 = create_df(8, 13, 15, 19)
plot5 = create_df(15, 19, 2, 6)
plot6 = create_df(15, 19, 15, 19)

ggplot(plot1, aes(Var1, Var2, fill= data)) + 
  geom_tile() + scale_fill_gradient(low="blue", high="red") +
  theme_ipsum()

ggplot(plot2, aes(Var1, Var2, fill= data)) + 
  geom_tile() + scale_fill_gradient(low="blue", high="red") +
  theme_ipsum()

ggplot(plot3, aes(Var1, Var2, fill= data)) + 
  geom_tile() + scale_fill_gradient(low="blue", high="red") +
  theme_ipsum()

ggplot(plot4, aes(Var1, Var2, fill= data)) + 
  geom_tile() + scale_fill_gradient(low="blue", high="red") +
  theme_ipsum()

ggplot(plot5, aes(Var1, Var2, fill= data)) + 
  geom_tile() + scale_fill_gradient(low="blue", high="red") +
  theme_ipsum()

ggplot(plot6, aes(Var1, Var2, fill= data)) + 
  geom_tile() + scale_fill_gradient(low="blue", high="red") +
  theme_ipsum()

```
```{r}
# 1c
tmpSM1 = matrix(tmpSM1, 1, 441)
tmpSM2 = matrix(tmpSM2, 1, 441)
tmpSM3 = matrix(tmpSM3, 1, 441)
tmpSM4 = matrix(tmpSM4, 1, 441)
tmpSM5 = matrix(tmpSM5, 1, 441)
tmpSM6 = matrix(tmpSM6, 1, 441)
tmpSM = matrix(c(tmpSM1, tmpSM2, tmpSM3, tmpSM4, tmpSM5, tmpSM6), 441, 6)
tmpSM = t(tmpSM)

correlation2 = cor(t(tmpSM))
corrplot.mixed(correlation2, upper = "circle")
correlation2
# Are theres SM all independent? - yes as not correlated
# Why standardisation not important - If we are looking to replicate it then 
# We still just have two main areas - zero and non zero so the scale of non 0
# Doesn't matter as much
```


```{r}
#1d
set.seed(30034)
noise_t = rnorm(6 * 240, mean = 0, sd = sqrt(0.25))
noise_s = rnorm(6 * 441, mean = 0, sd = sqrt(0.15))


noise_s = matrix(noise_s, 6, 441)

noise_t = matrix(noise_t, 240, 6)
```


```{r}
# 1d
correlation3 = cor(noise_t)
corrplot(correlation3, tl.srt = 0)

correlation4 = cor(t(noise_s))
corrplot(correlation4, tl.srt = 0)
# Check if these two above are correlated
# Highest is like abs(0.12,0.15) so not really that strongly correlated
```


```{r}
# 1d
# Both look pretty normally distributed with over 95% of the data covered within -1.96, 1.96
hist(noise_s)
hist(noise_t)

  # Both are equal to 1 even with formula variance = 1.96sd, noise_s = 0.945 so pre close, noise_t slight less 0.936 makes sense with graph
#length(noise_s[(0 - 2*sqrt(0.15) <= noise_s) & (noise_s <= 0 + 2*sqrt(0.15))]) / length(noise_s)
#length(noise_t[(0 - 2*sqrt(0.25) <= noise_t) & (noise_t <= 0 + 2*sqrt(0.25))]) / length(noise_t)

# noise s looks way more normally distributed, while t looks kinda skewed.
# do conf int to normal dist
# Check whether fills var of 1.96*sd (0.95 data)

correlation5 = cor(noise_t %*% noise_s)
#corrplot(correlation5, tl.srt = 0)
subset = correlation5[1:10, 1:10]
corrplot(subset, tl.srt = 0)
subset
#corrplot(correlation5, tl.srt = 0)[1:10, 1:10]
# Definitely some correlation eg higher covariance values such as 0.7

```


```{r}
#1e

#Can full_tc%*% noise_S and vice versa exist and what happens to them as if we keep we cannot fit model?
X = (full_TC + noise_t) %*% (tmpSM + noise_s)
scaled_X = matrix(NA, 240, 441)
for (i in 1:441) {
  scaled_X[,i] = scale(X[,i])
}


# Plot graph of sample Time series
set.seed(1)
mysample <- sample(nrow(X), 100)
mysample
sample = X[1:nrow(X), mysample]

#for (j in 1:10) {
#  if (j == 1) {
#    plot(sample[1:nrow(X), (i - 1)*10 + j], type = "line")
#  }
#  else {
#    if (j == 2) {
#      lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'red')
#    }
#    
#    if (j == 3) {
#      lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'blue')
#    }
#    
#    if (j == 4) {
#      lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'green')
#    }
#    
#    if (j == 5) {
#      lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'yellow')
#    }
#    if (j == 6) {
#      lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'darkorange')
#    }
#    
#    if (j == 7) {
#      lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'cyan')
#    }
#    if (j == 8) {
#      lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'brown')
#    }
#    if (j == 9) {
#      lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'grey')
#    }
#    
#    if (j == 10) {
#      lines(sample[1:nrow(X), (i - 1)*10 + j], col = 'beige')
#    }
#    
#  }
#  
#}

# What info does the plot of vars give
variances = colVars(X)
plot(variances, type = "line")



```


```{r}
# 2a
A_LSR = solve(t(full_TC) %*% full_TC) %*% t(full_TC) %*% scaled_X
D_LSR = scaled_X%*% abs(t(A_LSR))


#  Plot and heatmap together
plot(D_LSR[1:nrow(D_LSR),1], type = "line")

# produce legend for heatmap
#heatmap(matrix(A[1,1:ncol(A_LSR)], 21, 21), ncol, Colv = NA, Rowv = NA, scale="column")



for (num in 1:6) {
  df = as.data.frame(matrix(rep(0, 441 * 3), 441, 3))
  count = 1
  col = abs(A_LSR[num,])
  for (i in 1:21) {
    for (j in 1:21) {
      df[count, 1] = i
      df[count, 2] = j
      df[count, 3] = col[(i-1) * 21 + j]
      count = count + 1
    }
    
  }
  ggplot(df, aes(V1, V2, fill= V3)) + 
  geom_tile() + scale_fill_gradient(low="blue", high="red") +
  theme_ipsum()
}






# WHy linear relo bet 3rd col d_lsr and 30th of X
# Secondly if you look at the slice number 3 build up by third SM. Now read this 3rd SM column-wise, you will find that 30th (2nd column 9th row =30th pixel) pixel position was filled by this 3rd SM and therefore third TC is the only time course that constructs 30th column of X and this is the TC that you retrieve in 3rd Dlsr. There might be some variance in the scatter plot but you will be able to capture visually the linear trend between 3rd Dlsr and 30th X.
#linear relo - 
plot(D_LSR[1:nrow(D_LSR), 3], scaled_X[1:nrow(scaled_X), 30], xlab = "3rd column of D(LSR)", ylab = "30th column of scaled X")

# No linear relo
plot(D_LSR[1:nrow(D_LSR), 4], scaled_X[1:nrow(scaled_X), 30], xlab = "3rd column of D(LSR)", ylab = "30th column of scaled X")
```
```{r}
# Gets the sum of the maximum absolute values in the correlation matrix
max_abs_corr_sum = function(mat1, mat2) {
  corre_mat = cor(mat1, mat2)
  c = get_max_correlations(corre_mat)
  return(sum(c))
}

# Returns the values of the maximum absolute values for each row
get_max_correlations = function(cor_mat) {
  c_var = c(rep(0,6))
  abs_mat = abs(cor_mat)
  cols = max.col(abs_mat)
  
  for (i in 1:6) {
    c_var[i] = cor_mat[i, cols[i]]
  }
  return(c_var)
}
```


```{r}
#2b
V = 441
MSE = matrix(0, 1, 2)
for (num in seq(from = 0, to = 1, by = 0.01)) {
  lamda = num
  lamda_hat = lamda * V
  A_RR = solve(t(full_TC) %*% full_TC + diag(nrow(t(full_TC))) * lamda_hat) %*% t(full_TC) %*% scaled_X
  mse = (sum((scaled_X - full_TC %*% abs(A_RR))^2)) + lamda_hat * sum(A_RR^2)
  MSE = rbind(MSE, c(lamda, mse))
}

plot(MSE[2:nrow(MSE), 1], MSE[2:nrow(MSE), 2])

# From the graph it looks like best value of lamda is 1
A_RR = solve(t(full_TC) %*% full_TC + diag(nrow(t(full_TC))) * 1* V) %*% t(full_TC) %*% scaled_X
D_RR = scaled_X%*% abs(t(A_RR))
c_tlsr = max_abs_corr_sum(full_TC, D_LSR)
c_trr = max_abs_corr_sum(full_TC, D_RR)

# 4.407241
c_tlsr

# 4.47653
c_trr


c_trr - c_tlsr


```
```{r}

lamda = 1000
lamda_hat = lamda * V
A_1000 = solve(t(full_TC) %*% full_TC + diag(nrow(t(full_TC))) * lamda_hat) %*% t(full_TC) %*% scaled_X


# As A_LSR decrease, A_RR values decrease
plot(abs(A_1000[1:nrow(A_1000), 1]), abs(A_LSR[1:nrow(A_LSR), 1]), xlab = "A_RR", ylab = "A_LSR")

```

```{r}
create_noise_matrix = function(seed) {
  set.seed(seed = seed)
  noise_t = rnorm(6 * 240, mean = 0, sd = sqrt(0.25))
  noise_s = rnorm(6 * 441, mean = 0, sd = sqrt(0.15))


  noise_s = matrix(noise_s, 6, 441)
  noise_t = matrix(noise_t, 240, 6)
  
  X = (full_TC + noise_t) %*% (tmpSM + noise_s)
  new_X = scale(X)
  return(new_X)
}
noise_1 = create_noise_matrix(30035)
noise_2 = create_noise_matrix(30037)
noise_3 = create_noise_matrix(30038)
noise_4 = create_noise_matrix(30036)
noise_5 = create_noise_matrix(30039)
noise_6 = create_noise_matrix(30040)
noise_7 = create_noise_matrix(30041)
noise_8 = create_noise_matrix(30042)
noise_9 = create_noise_matrix(30043)
noise_10 = create_noise_matrix(30044)


noise_df = list(noise_1, noise_9, noise_8, noise_7, noise_6, noise_5,
                noise_2, noise_3, noise_4, noise_10
                )
#for(mat in noise_df) {
#  print(mat[1:5, 1:3]
#}


```

```{r}
#2c
LR_MSE = matrix(NA, 21, 10)
N = 240
x1 = 21
x2 = 21
nsrcs = 6
V = x1 * x2
i = 1
j = 1
step <- 1/(norm(full_TC %*% t(full_TC)) * 1.1)

for (num in seq(0,1,0.05)) {
  for (x_rep in noise_df) {
    thr <- num*N*step
    Ao <- matrix(0, nsrcs, 1)
    A <- matrix(0, nsrcs, 1)
    Alr <- matrix(0, nsrcs, x1*x2)
    for (k in 1:(x1*x2)) {
      A <- Ao+step*(t(full_TC) %*% (x_rep[,k]-(full_TC%*%Ao)))
      A <- (1/(1+thr)) * (sign(A)*pmax(replicate(nsrcs, 0), abs(A)-thr))
      
      for (rep in 1:10) {
        Ao <- A
        A <- Ao+step * (t(full_TC)%*%(x_rep[,k]-(full_TC%*%Ao)))
        A <- (1/(1+thr)) * (sign(A)*pmax(replicate(nsrcs, 0), abs(A)-thr))
      }
      
      Alr[,k] <- A
    }
    Dlr = x_rep %*% abs(t(Alr))
    LR_MSE[i,j] = sum(sum((x_rep-Dlr%*%abs(Alr))^2)) / (N*V)
    j = j + 1
  }
  j = 1
  i = i + 1
}

LR_avgs = rowMeans(LR_MSE)
plot( seq(0,1, 0.05), LR_avgs, ylab = "MSE(LR)")
# Min value is 0.580 when p = 0.55, at same value it diverges

# Since first index is at 0, we want the 12th value between 0 and 1 which is 0.6 
# So we need to index the 13th value
index = which.min(LR_avgs)
rho = (index - 1) * 0.05
```

```{r}
# 2d

thr <- rho*N*step
Ao <- matrix(0, nsrcs, 1)
A <- matrix(0, nsrcs, 1)
Alr <- matrix(0, nsrcs, x1*x2)
for (k in 1:(x1*x2)) {
  A <- Ao+step*(t(full_TC) %*% (scaled_X[,k]-(full_TC%*%Ao)))
  A <- (1/(1+thr)) * (sign(A)*pmax(replicate(nsrcs, 0), abs(A)-thr))
  
  for (rep in 1:10) {
    Ao <- A
    A <- Ao+step * (t(full_TC)%*%(scaled_X[,k]-(full_TC%*%Ao)))
    A <- (1/(1+thr)) * (sign(A)*pmax(replicate(nsrcs, 0), abs(A)-thr))
  }
  
  Alr[,k] <- A
}
Dlr = scaled_X %*% abs(t(Alr))
```

```{r}
ctrr = max_abs_corr_sum(full_TC, D_RR)
csrr = max_abs_corr_sum(t(tmpSM), t(A_RR))
ctlr = max_abs_corr_sum(full_TC, Dlr)
cslr= max_abs_corr_sum(t(tmpSM), t(Alr))

# Both are true
ctlr - ctrr #= 0.7413487
cslr - csrr #= 0.6595151
ctlr #= 5.217879
ctrr #= 4.47653
cslr #= 2.953101
csrr #= 2.293586

plot(D_RR[, 1:4])
plot(Dlr[, 1:4])
plot(Alr[1:4,])
plot(A_RR[1:4, ])

par(mfrow = c(1,2))
for (num in 1:6) {
  plot(D_RR[, 6], type = "line")
  plot(Dlr[, 6], type = "line")
}



df = as.data.frame(matrix(rep(0, 441 * 3), 441, 3))
count = 1
vec = abs(A_RR[num,])
for (num in 1:6) {
  for (i in 1:21) {
    for (j in 1:21) {
      df[count, 1] = i
      df[count, 2] = j
      df[count, 3] = vec[(i-1) * 21 + j]
      count = count + 1
    }
  
  }
}

df = as.data.frame(matrix(rep(0, 441 * 3), 441, 3))
count = 1
vec = abs(Alr[num,])
for (num in 1:6) {
  for (i in 1:21) {
    for (j in 1:21) {
      df[count, 1] = i
      df[count, 2] = j
      df[count, 3] = vec[(i-1) * 21 + j]
      count = count + 1
    }
  
  }
}

ggplot(df, aes(V1, V2, fill= V3)) + 
  geom_tile() + scale_fill_gradient(low="blue", high="red") +
  theme_ipsum()

```

```{r}
par(mfrow=c(1,2))
# 2e
#svd(full_TC)
plot(svd(full_TC)$d, ylab = "Eigenvalue")
#PC 6 smallest

plot(svd(full_TC)$u[1:240, 6])
plot(full_TC[1:240, 6])

plot(svd(full_TC)$u[1:240, 5])
plot(full_TC[1:240, 5])

plot(svd(full_TC)$u[1:240, 4])
plot(full_TC[1:240, 4])

plot(svd(full_TC)$u[1:240, 3])
plot(full_TC[1:240, 3])

plot(svd(full_TC)$u[1:240, 2])
plot(full_TC[1:240, 2])

plot(svd(full_TC)$u[1:240, 1])
plot(full_TC[1:240, 1])


```




